13. Why do cells need both tRNA and mRNA? (1 point)

Only mRNA can be used to repair mistakes in the DNA sequence.
Only tRNA bends into a shape that can carry specific amino acids.
The tRNA in used on the ribosomes and the mRNA is used in the nucleus.
The mRNA brings information to the nucleus for the tRNA to use.
14. (03.06 LC)
Mutation does not always affect the evolution of a species because (1 point)

not all mutations are inherited
not all mutations are beneficial
not all mutations cause visible change
not all mutations affect an entire species
15. (03.06 MC)
A chromosome that is exposed to a mutagen breaks into two pieces. A portion off one of the ends is removed before the two pieces rejoin. The mutation that occurs is (1 point)

deletion
duplication
inversion
non-disjunction
16. (03.06 MC)
Which of the following mutations is least likely to develop into a cancerous tumor? (1 point)

A non-disjunction mutation
A chromosomal deletion mutation
A inversion chromosomal mutation
A single point mutation
17. (03.06 MC)
The mutagens that result in cancer damage DNA by (1 point)

destroying the cell's p53 gene directly thereby increasing cell production
weakening the DNA strand or interfering with base paring
altering the cell's pH and allowing increased cell production
becoming a virus that attacks DNA directly, impairing duplication

Answers

Answer 1

1. tRNA is the one carrying amino acids

2. Mutation does not always affect the evolution of a species because not all mutations affect an entire species.

3. The type of chromosomal mutation that occurs here is an example of a deletion mutation. Specific genetic data, or DNA is removed and the remaining portions of chromosomal information have rejoined.

4. A chromosomal deletion mutation

5. The mutagens that result in cancer damage DNA by (b) weakening the DNA strand or interfering with base pairing. This mutagens are called carcinogens, if they cause a damage to a gene that makes a DNA repair protein, it means that a cell will have less ability to repair itself, and ,as a result, this will lead to formation of cancer.

Answer 2

Answer:

Answer 1: Option (C):The tRNA in used on the ribosomes and the mRNA is used in the nucleus.

Answer 2:Option(C): There is no effect on the phenotype of a specie, as most of the species DNA is altered and there are a few changes which occurs inside the phenotype of any specie exposed to mutation in general.

Answer 3:Option(A):Deletion is a type of mutation during which the part of the genetic sequence or DNA is not placed at its original position but the loss of the fragment occurs, in the process causing the change in the genome of the specie.

Answer 4:Option (B): The weakening the DNA strand or interfering with base pairing of the DNA sequence inside the DNA molecules.

Explanation:

tRNA is present inside the ribosomes, as it operates by detaching the required number of amino acids and letting the sequence change into the required proteins, which then goes out of the ribosomes into the cell body.Mutation has no such effect on the phenotype or the visible properties of any specie. As much of the mutation which occurs is in the DNA sequence of the specie which is exposed to the effect.Mutations basically brings change to the actual or original DNA sequence of the specie, as during the process a fragment or any part or sequence of nucleotide's are altered and are lost in the process to create a new DNA molecule, as the process is called as Deletion in the mutation term. As it will cause different disorders and the diseases inside the organism.Carcinogen, there are different elements which causes different alterations in the DNA and in the over all genome of the specie. As the DNA sequence is altered and in the base pairing of the sequences inside the genome of the species.

Related Questions

Answers

Ana, a two-year-old baby girl appears to be well fed but is deficient of certain important proteins. her hair is thin, colorless, and brittle. based on these symptoms, the doctor examining ana, is likely to relate her condition to the disorder of Kwashiorkor.

- it is also known as edematous malnutrition because of its association to fluid retention or edema. It is a nutritional disorder which a person has deficiencies in protein in his or her diet. Treatment is through extra calories and protein add up in the person's diet.

A student runs up a flight of stairs. other than the skeletal system, which body system would be most immediate in its support of the muscular system in this activity?

Answers

The respiratory system to keep the body well oxygenated

i would think the cardiac muscle because your blood would be pumping.

Mr. jones has a large kidney stone that is obstructing the flow of urine in his left kidney, resulting in kidney enlargement and backing up of urine into his ureter. this is known as:

Answers

It is called hydroureter.

Good luck :)

The diagonal arrow of a cladogram shows us that we are moving _________ in time.

Answers

The diagonal arrow of a cladogram shows us that we are moving forward in time.

The common ancestor of the protostomes had a coelom. what does this suggest?

Answers

This suggests that the body cavity (coelum) evolved before the lophophore. Protostomes are one of the groups of animals having a true body cavity and are believed to share a common ancestor. They include annelids, mollusks, and arthropods. Lophophore is an organ characteristic of aquatic invertebrates (protostomes) that functions in filter feeding, it consists of a ridge of hollow tentacles bearing cilia, which waft food particles into the mouth.

Your body can manufacture certain amino acids as they are needed, others must come from your diet. the amino acids that come from your diet are known as:

Answers

Essential amino acids

PLZ HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!! 20 pts!!!!!!!!!!!!!!!!!!

When a mass of earth falls down a hillside and destroys what's in its path it is called...what?

Answers

Are you thinking of the word landslide?

I'm not quite sure on this but is it a rock avalanche.

For the eighth observation (i=8), identify the animal phylum, xi, and yi.

Answers

The correct answer is "Phylum Urochordata: xi = 25; yi = 77".
The table presented in this exercise can be used as a tool to examine any connection between the microRNA (miRNA) diversity and the morphological complexity in a phylum. The Xi column represents the average number of miRNAs in a phylum, while the Yi column represents the average number of cell types in that phylum. The eight observation of this table refers to the data obtained from the phylum Urochordata.
MicroRNAs are small non-coding RNAs which regulate gene expression post-transcriptionally. They are used as phylogenetic markers as they have a very low rate of evolution. Also, they are very useful because it has been shown that phyla with very high levels of morphological innovation have high numbers of miRNA concentration.

The role of the respiratory system is to bring what substance into the body? question and answer

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I would say oxygen since the respiratory system's job is to bring oxygen and rid the body of carbon dioxide.

The role of the respiratory system is to bring oxygen into the body.

During which stage of the cell cycle does the cell membrane pinch the cell in two

Answers

It is during the phase cytokinesis that the cell membrane separates the cell into two.

A nurse is caring for a 7-year-old child in the pediatric intensive care unit who has increased intracranial pressure as a result of head trauma. the healthcare provider prescribes intravenous mannitol. the nurse monitors the child's intracranial pressure and urine output because mannitol belongs to which classification of diuretics?

Answers

There are choices for this question namely:

Loop
Osmotic
Potassium sparing
Carbonic anhydrase inhibitor

The correct answer is "osmotic". Osmotic diuretics such as mannitol exert an osmotic pressure in the renal tubules that "pull" the water from the interstitium to the tubules therefore increasing urine output (and subsequently diluting sodium). Osmotic diuretics are commonly used to treat increased intracranial pressure secondary to cerebral edema.

The client is admitted with paroxysmal supraventricular tachycardia at a rate of 140 beats per minute. the client's blood pressure is 110/55 mm hg, and the client is asymptomatic except for a "fluttering feeling" in the chest. which treatments should the nurse be prepared to administer

Answers

The correct answers are: IV adenosine, IV beta blockers, IV amiodarone, or IV calcium channel blockers. Supraventricular tachycardia is a kind of abnormal heart rate and the pathology lies in the atria (hence supraventricular). This is seen in the ECG as narrow QRS complexes. While all the management is applicable for supraventricular tachycardia, the first line is IV adenosine to normalize the heart rate. If this doesn't work, then IV amiodarone can be the second line. After these interventions are done but with no avail, cardioversion should be done.

In class switching in the secondary antibody response, the most common antibody switch is from

Answers

I believe that the most common antibody switch is from IgM to IgG.
Class switching occurs by a mechanism called the class switch recombination binding. It is a biological mechanism that allows the class of antibody produced by an activated B cell to change during a process known as isotype or class switching. The mechanism changes a B cell's production of antibodies from one form to another, such as from the isotype IgM to the isotype IgG.

The breathing center in the brain is most sensitive to the ________________. concentration of carbon dioxide in the lungs amount of oxygen in the cells concentration of oxygen concentration of carbon dioxide in the blood

Answers

Concentration of carbon dioxide in the blood is your answer :)

Which is not correctly paired concerning parasympathetic outflow? which is not correctly paired concerning parasympathetic outflow? the glossopharyngeal nerve innervates salivary glands the oculomotor nerve innervates smooth muscle in the eye that allows for pupil constriction the nerves coming from the thoracic region innervate stomach and liver the nerves coming from the sacral section innervate lungs and heart the vagus nerve stimulates many glands in the head like lacrimal and salivary glands?

Answers

The list of not correctly paired parasympathetic outflow would be:
1. nerves coming from the sacral section innervate lungs and heart
2. vagus nerve stimulates many glands in the head like lacrimal and salivary glands

Sacral region is located in the tailbone, near the hip. The location itself too far from lungs and heart, which actually nerved by vagus.
Lacrimal and salivary glands are nerved by the submandibular (cranial VII) and glossopharyngeal(cranial IX), not vagus(cranial X)

Which organism is most closely related to canis familiaris?

Answers

Dogs are related to canis familiaris

Which property is shared by the processes of replication and transcription?
a. they both take place in the cytoplasm of the cell.
b. one strand of nucleic acid serves as a template for synthesis of another.
c. they both make copies of dna.
d. they require ribsomes.
e. they both use the nucleic acid uracil?

Answers

I think the answer is C. I hope it's right.

Answer:

b. one strand of nucleic acid serves as a template for synthesis of another.

Explanation:

Replication is the process of synthesis of new DNA molecules using the existing DNA strands as a template.

Transcription is the process of synthesis of RNA using the template DNA strand to copy its nucleotide sequence.

Both replication and transcription use existing DNA strands as a template to make new strands of nucleic acids. Both processes occur inside the nucleus.

Are carbohydrates used for long term energy storage?

Answers

Carbohydrates and lipids can both be used as energy storage however carbohydrates are usually used for short term storage whereas lipids are used for long term storage. Carbohydrates are soluble in water unlike lipids. This makes carbohydrates easy to transport around the body (from and to the store).

Mice eat corn. Hawks eat mice. Which term describes the corn in this food chain?

a. secondary consumer

b. primary consumer

c. producer

d. decomposer

Answers

c. producer, the corn creates its own 'food' with photosynthesis. It's easier to remember as a flow chart producer(typically plants)->primary consumer(mostly herbivores)->secondary consumer(predators and other meat eaters) and decomposers(usually fungus) eat basically everything.

The correct answer is producer.

The term producer means the autotrophic plants that makes food for themselves. The primary consumer such as mice feeds on the producer (corn) for their energy requirement. Producers lie at the first level of the food chain. Producers are the blue-green plants that makes food by the process of photosynthesis by using sunlight.

In tunicates, the anus empties into the excurrent siphon. what is the advantage of this anatomical arrangement?

Answers

TUNICATES are hermphrodite, with their general excurrent pore. They can release sperm and eggs through this structure. These organisms are considered filter feeder eating mianly plankton. Adults, are sessile and form a leathery tunic hence the name. This tunic supports and protects the animal. They have 2 openigs in the body the oral siphone and atrial siphone, Oral siphon sucks water into the animal and the atrial siphon squirts out the water from the animal's body.

Final answer:

In tunicates, having the anus empty into the excurrent siphon expels waste away from the organism, preventing contamination of their feeding system and maintaining a clean environment.

Explanation:

The anatomical arrangement of the anus emptying into the excurrent siphon in tunicates provides notable advantages. Most tunicates are stationary, which means they rely on water movement around them for essential processes like feeding and excretion. The incurrent siphon brings in water that contains food particles and plankton, which are then filtered by the pharyngeal slits and trapped in a mucus net. This filtered material is then ingested and processed by the digestive system. The presence of the anus in the excurrent siphon is beneficial as it ensures that waste is expelled in a directed manner, away from the animal, through the excurrent siphon. This efficient waste elimination helps to prevent contamination of the suspension feeding system and maintains the organism's living environment clean from their own excreted waste, which is crucial for an organism living in a fixed location.

Which of these allow nutrients to diffuse form the central canal to all the osteocytes within an osteon?

Answers

caniculi :) :P.............

"secretion of glucagon from the pancreas results in ________, which causes a(n) ______"__ in blood glucose levels.

Answers

Secretion of glucagon from the pancreas results in break down of glycogen, which causes an increase in blood glucose levels. Glucagon is a hormone that is produced by alpha cells in a part of the pancreas known as the islets of Langerhans. It is released in response to low blood glucose levels and to events where the body needs additional glucose, such as in response to vigorous exercise. It stimulates break down of glycogen, activates gluconeogenesis (the conversion of amino aids to glucose) and break down of stored fats into fatty acids. This results to high blood glucose levels.

In some species, young individuals float freely as plankton while mature members are fixed on the seafloor. this is an effective strategy because

Answers

This is an effective strategy because different phases do not compete for food.
For example for the case of Jelly fish, After a brief period floating about in surface waters like planktons, the larvae then settles to the sea floor, attaching themselves to one end. They then develop to polyps and begin to feed and grow. In spring the polyps bud iff immature jellyfish known as ephyra larvae which then grow to mature jellyfish.

What name is given to organisms that convert the carbon in organic compounds into carbon in carbon dioxide?

Answers

Decomposers are organisms that convert the carbon in organic compounds into carbon in carbon dioxide.

Non-photosynthetic organisms convert the carbon in organic compounds into carbon in carbon dioxide.

What are organic compounds?

The process by which organisms that engage in photosynthetic growth, like plants and algae, convert inorganic carbon compounds (typically carbon dioxide) into organic carbon compounds examples of processes that cause carbon to transfer from one reservoir to another include photosynthesis, respiration, and combustion.

The process of cellular respiration involves the oxidation of biological fuels in the presence of an inorganic electron acceptor, such as oxygen, to generate significant amounts of energy that are used to power the major production of ATP.

Therefore, cellular respiration is a series of metabolic processes that take place inside of cells to transform biochemical energy from food into a substance known as adenosine triphosphate.

Learn more about organic compounds, here:

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The scientific name for a white oak is Quercus alba; the scientific name for a red oak is Quercus rubra. What does this tell you about the organism? A. White oaks are grouped in the genus Quercus. B. Red oaks are grouped in the genus alba. C. Red oaks are grouped in the species Quercus. D. White oaks are grouped in the same species category as red oaks.

Answers

Within the species names Quercus alba and Quercus rubra, Quercus indicates the genus. Therefore, both species of oak belong to the same genus. The only correct statement above therefore is A: 'White oaks are grouped in the genus Quercus'.

Answer:

rong

Explanation:

A clerk can sort 375 sheets of per hour. If there are 225 sheets in an inch, how long will it take her to file 125 inches of loose leaf?

Answers

Answer: 75hours

Explanation:

If there are 225 sheets in one inch that means that in 125 there will be 28,125 sheets because you will have to multiply. And if you can sort 375 pero hour that will mean than in 75 hours you will sork all sheets because 28,125 divided by 375 sheets pero hour will give 75 hours.

125 inch * 225 sheet/ inch= 28,225 sheets

28,225 sheets divided by 375 sheets/hour=75 hours

It will take them 75 hours to file all the sheets in the bundle.

What is speed?

The rate of change of position of an object is called speed. Speed is a scalar quantity, which means the measurement of direction is not important in the case of speed.

That is why it is different from velocity which is a vector quantity. In velocity, the rate of change of motion is measured in a particular direction.

Because speed measures the rate of a change in motion, it is not useful to be used in this case.

In this case, the rate of filing is 375 sheets/hour.

There are 225 sheets in an inch and a total of 125 inches of sheets.

So the total number of sheets is equal to

225 × 125 = 28125 sheets.

Rate of filing = 375 sheets/hour

So, 28125/375 = 75.

Therefore the time required to file all of the sheets is equal to 75 hours.

Answers

the answer is carbon

The answer is (Carbon)

How did photosynthesis lead to the development of animals living on land?

Answers

Photosynthesis was essential for filling the Earth atmosphere with oxygen that is necessary for metabolic processes of all animals.
Only after the plants colonized the land and raised the levels of oxygen in the atmosphere to levels high enough to sustain animal respiration did the animals move from aquatic to terrestrial way of life.

Around 2.4 billion years ago, the first photosynthetic organisms appeared and used inorganic matter like carbon dioxide and water to produce glucose, with oxygen released in the atmosphere. Because of this, oxygen levels rose; this is called the Great Oxygenation Event. Through time, photosynthetic organisms evolved to live in land (now as plants). As concentrations of oxygen in the atmosphere became higher, marine animals evolved to utilize oxygen readily available from the atmosphere (rather dissolved in water) hence the evolution of marine animals to land animals capable of respiration in land.

What do biologists call groups of cells that are specialized to secrete substances outside the cells?

Answers

The correct answer is "glands".
Glands are groups of cells which are formed from epithelial tissue and produce substances, such as hormones. They can be divided into two categories, exocrine or endocrine. Endocrine glands secrete these substances into the bloodstream, while exocrine glands release the substances into some of the body's cavities or the outer surface.

Which of the following is not a piece of molecular evidence supporting the endosymbiotic theory?

Answers

The mitochondria and chloroplasts are much different in structure than bacteria. Hence the correct option is a.

One piece of molecular evidence supporting the endosymbiotic theory is the similarity between the DNA of mitochondria and chloroplasts and that of bacteria. This similarity suggests that mitochondria and chloroplasts may have originated from free-living bacteria that were engulfed by ancestral eukaryotic cells and formed a symbiotic relationship.

Additionally, the presence of ribosomes in mitochondria and chloroplasts that resemble those found in bacteria further supports this theory. Moreover, the mechanism of division by fission, which is similar to bacterial reproduction, observed in some organelles like mitochondria and chloroplasts provides further evidence for their bacterial origins.

However, the structural differences between mitochondria, chloroplasts, and bacteria do not directly support the endosymbiotic theory but rather suggest evolutionary adaptations that have occurred over time. Therefore, option A is not a piece of molecular evidence supporting the endosymbiotic theory. Hence the correct option is a.

Complete question:

Which of the following is not a piece of molecular evidence supporting the endosymbiotic theory?

A. The mitochondria and chloroplasts are much different in structure than bacteria.

B. Ribosomes of some organelles are like that of those found in bacteria.

C. Some organelles divide by fission just like bacteria.

D. Mitochondrial and chloroplast DNA is similar to bacterial DNA.

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